Fluorescent non-linear chiral polymer chemosensor bonded alternatively with 1,4-diethynyl-2,5-dioctyloxybenzene and (R,R)-salen for Zn2+recognition
作者:Sekarpandi Sakthivel、Suribabu Jammi、Tharmalingam Punniyamurthy
DOI:10.1016/j.tetasy.2012.01.018
日期:2012.1
Stereoregular non-linear chiral main chain polymers 1a–b bonded alternatively with (R,R)-salen and 1,4-diethynyl-2,5-dioctyloxybenzene moieties have been synthesized using palladium catalyzed C–C cross-coupling and Schiff base formation reactions as the key steps. These polymers are soluble in common organic solvents, and act as an effective chemosensor for the detection of Zn2+ with respect to other metal ions
通过钯催化的CC交叉偶联和席夫碱形成,合成了与(R,R)-salen和1,4-二乙炔基-2,5-二辛氧基氧基苯部分交替键合的立体球形非线性手性主链聚合物1a – b反应是关键步骤。这些聚合物可溶于常见的有机溶剂中,并充当有效的化学传感器,用于检测具有增强荧光的其他金属离子中的Zn 2+。观察到的聚合物1a – b的CD光谱可以归因于具有低链间相互作用程度的螺旋二级结构。从吡啶到Zn(II)-聚合物1b络合物的滴定确定了链间相互作用的降低,这导致荧光发射的微小变化。